Natynczyk had been head of the space agency since August 2013, when he replaced former Canadian astronaut Steve MacLean.

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In a separate statement released by the space agency, Natynczyk said it was an honour to have served as its president. He added that no matter where he is, he will continue to support Canada's space program.

The retired military general served as the Canadian Forces' chief of defence staff from 2008 to 2012.

Iain Christie, executive vice-president of the Aerospace Industries Association of Canada, expressed surprise when informed of the move.

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